From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Carburettor mixture testing, troubleshooting, and performance comparison between Phantom and Silver Ghost models.
| Identifier | ExFiles\Box 178\1\ img071 | |
| Date | 26th November 1925 | |
| - 10 - EXPERIMENTAL REPORT. EXPL. No. REF. Hs{Lord Ernest Hives - Chair}/ACL/LG261125. found by experiment, will probably vary slightly from the above figure but no excessive variation should occur as this should indicate some other trouble - possibly in the induction system. The mixture should be tested at the point where the air valve ports start to open by observing the position of the mixture control which gives the steadiest running. if it should be exceedingly rich at this position - assuming that the high speed jet is correctly adjusted - the fault will most probably lie in the spring having too much pressure on the air valve and vice-versa if weak. It is unlikely for this trouble to occur due to the spring, providing it has not been stretched or otherwise altered. We may add that the New PhantomCodename for PHANTOM I carburetter is very little different to the Silver Ghost in design, therefore when criticising its performance we should not expect to observe any marked difference. Again there is no carb. made which automatically gives absolute perfection under all conditions of working, but the Phantom - like the Silver Ghost, should, if correctly adjusted, give a better all round performance than that obtained by most of our competitors. Appended is a table giving some of the possible troubles and their causes. Hs{Lord Ernest Hives - Chair}/A.C.Lovesey. | ||